Sublimation of Caffeine from Tea Leaves By: Ashley Barnes CH 236 – P8 Experiment 4 & 4.5 Due: 10/15/2014 Table 1. Table of Reagents Discussion The extraction yield refers to the percent of caffeine in the tea leaves at start of the extraction experiment. Tea leaves had 0.55 grams of mass per eight ounce serving. The weight of the extracted crude caffeine was 0.264 grams. Therefore‚ the extraction yield was 48%. This means that we pulled out almost half of the caffeine in tea leaves
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Redistribution effects of interest rate changes - Further work - Money markets - Markets - Economics bank - Virtual Bank of Biz/ed Economics bankMonetary PolicyMarketsMoneyEurope Markets - Money markets Further work - Redistribution effects of interest rate changes Higher interest rates‚ other things being equal‚ lead to a reduction in consumer spending and lower interest rates tend to encourage it. However‚ this is not true for all individuals. For example‚ a person living
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The problem for this experiment is how does the amount of caffeine affect the speed and performance of a mouse. The hypothesis is if the amount of caffeine consumed by the mouse is increased‚ then the time at which the mouse completes a set obstacle course will decrease when time is a function of caffeine quantity. The amount of caffeine consumed by the mouse before completing the obstacle course is the independent variable. The dependent variable of the experiment is the amount of time the mouse
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to eliminate caffeine from their diet. Central idea: By reducing the use of caffeine‚ individuals can break their addiction and become healthier. They can regain their sleep‚ activeness and become more aware. Introduction I. Imagine‚ you’ve got a math test tomorrow that you’ve hardly studied for and not to mention that a fifteen page paper you’ve also got due tomorrow. It’s already after midnight and you’ve only got 3 pages written. How are you going to stay awake? II. Caffeine is used to provide
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THE EFFECT OF pH LEVEL ON CORROSION RATE A Long Laboratory Report Presented To; The Department of Chemical Engineering BY
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EFFECTS OF GEOGRAPHICS AND RECYCLING 1 Effects of Geographic Location and Recycling Participation. EFFECTS OF GEOGRAPHICS AND RECYCLING Abstract Research was conducted to determine if recycling participation is affected based on where an individual lives and/or where they grew up. Many psychological and sociological studies have looked into the human behavior of recycling; what drives an individual to recycle and what are the key components to a successful recycling program. Results have
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Effect of Cohabitation on the Rising Divorce Rate The rise of the divorce rate seems to be due to the lack of commitment or understanding of love and longevity in a marriage. Cohabitation can be defined as an arrangement whereby two people decide to live together on a long term or permanent basis in an emotionally and /or sexually intimate relationship (Brannon 2008). Cohabitation is seen as the best way to understand a prospective mate in terms of living and financial stability
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Chm235LL 2/18/14 Caffeine Isolation Lab I. Abstract Solid crude caffeine was extracted from tea and purified via sublimation. The melting point was experimentally found at 215.9-218.7oC. II. Introduction Caffeine is the most dangerous substance being used in lab this semester‚ but it’s also one of the most favorite chemicals commonly ingested among college students. The main purpose of this lab was to extract caffeine from a beaker of about 20 ml of tea. Sublimation was an effective and convenient
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The effect of molecular weight on the diffusion rates of Potassium permanganate (KMnO4)‚ Potassium dichromate(K2Cr2O7) and Methylene Blue^1 _________________ Group 3 Sec. X-1L February 6‚ 2012 ____________________ ABSTRACT The effect of molecular weight on the diffusion of substances were tested through the use of agar-water gel with three wells placed in a petri dish. Drops of three different substances namely: Potassium
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of one nation for that of another nation. A foreign exchange market sets the price of one currency in terms of the other; a price termed the foreign exchange rate‚ or simply exchange rate’ (www.amosweb.com/cgi-bin). Factors that influence foreign exchange rates are the balance of trade‚ inflation rate and the prevailing real exchange rates. Where a country experiences a trade deficit‚ which is more imports than exports; its currency will lose value as it means it sells more of its currency to get
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